Saturday, 22 August 2020

It Floats!



7 comments:

  1. Wauw! Wat mooi! Ik ben benieuwd hoe de boot gaat varen zodra ze haar zeil mag ontvangen! Ik neem aan dat er geen lekkages zijn?

    Denk je dat de boot gaat kunnen passen in jou garage nadat de mast, of verdere constructie wordt toegevoegd? Aan de fotos te zien een aantal posts terug wordt het steeds krapper en krapper.

    Ik kan niet wachten op de volgende blog-post!

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    1. Hi Ricky, hij was bij de eerste keer nog niet helemaal waterdicht. Vooral bij de zwaardkast die ik het eerst gelast heb zaten nog een paar kleine doorlassings-foutjes.

      En inderdaad kan de boot niet meer in de garage als ik de mastvoet (tabernakel) er op zet.
      Ik moet nu al het neuswiel van de trailer op de laagste stand zetten om hem onder de garagedeur door te krijgen.

      Leuk dat je reageert, en als je een keer wilt kijken is ook goed hoor.

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    2. Ah, de moeilijkheden van een boot maken uit metaal... Gelukkig ben je er nu achter, nu ze nog (vermoedelijk) makkelijk zijn op te lossen. Ikzelf heb redelijk wat ervaring met de scheepvaart, maar dan vooral beroepsvaart (ik ben scheepselektricien van beroep)

      Het lijkt me wel erg leuk om eens een kijkje te kunnen nemen, zeker aangezien ik zelf ooit ook de bouw van een PocketShip wil beginnen (maar dan wel in hout). Zou je je provincie/plaatsnaam kunnen emailen? rickyvanswaal (at) gmail.com. Ik ben benieuwd :).

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  2. Arjen, excited to find your vlog. I'm a fabricator / welder interested in converting small sailboats designs (for plywood) into aluminum. I understand the challenge with weight, but I see small aluminum jet boats (3m - 4m) with heavy motors and wonder why it can't be done with a sailboat. How closely does Narwhal float to her designed waterline?

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  3. Hi eunoe, where to start... I had weighted my boat including trailer just last weekend and as I expected it seems to be havier than the wooden version. It is lots of estimation in this case as I also added extra ballast (to be sure) which I took out again this weekend as well...

    With the extra ballast I would estimate that it sits about 1/2 to 1 inch lower in the water.

    If I would built it again I think I juse 3mm sheeting for the hull instead of 4mm. This needs a little bit more structural adaptation to get it stiff and strong. In my pocketship I did very little extra reinforcement in the hull and it still is very stiff and strong. I added some reinforcment in the cabin roof and beneath the seats which are 3mm sheet.

    I also made a (rough) comparisson between multiplex and aluminum sheeting.
    In the pocketship 6 mm multiplex is used which has a weight of around 5kg per m2. This is apart from the usual glass sheeting and epoxy which probably adds up a Kg or so.

    this is compareable with 2mm aluminum sheet which is in my opion too thin.
    3 mm aluminum sheet is around 8kg per m2 and so heavier.

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    1. I actually work for a boat builder but your project is outside of conventional experience, and I'd be happy to learn from you. 😁 I'm curious about the framing and supports. Did you change the interior supports for the hull / skin or did you more or less build it as designed? You probably know that metal boats usually make use of stringers (long strips of flat bar that run the length of the boat) to mediate between the frames and the hull. But wooden boats usually bond the planking directly to the frames... Aluminum is more difficult than steel or stainless steel, so that project deserves some respect. 👍

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  4. I had to change my blogger theme as you see. Somehow I could not read my text anymore (black on black).

    I started with the framing as designed. With 4mm sheet that proved to be more then adequate. 4mm 5058 is stiff enough. 3mm would not work as that is much more flexible. That needs stringers.

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